Prevalence of Keratoconus in a Refractive Surgery Population

Table 1

Epidemiology of keratoconus in various countries around the world.

Study	Country	Prevalence (cases/100,000)	Incidence (cases/100,000)	Age at onset (years)	Keratoconus family history (%)
Assiri et al. [13]	Saudi Arabia	—	20	18.5	16
Hashemi et al. [16]	Iran	4000	—	—	—
Ziaei et al. [29]	Iran	2500	22.3–24.9	—	15
Waked et al. [30]	Lebanon	3330	—	—	12.1
Millodot et al. 2011 [21]	Israel	2340	—	—	22
Shneor et al. [43]^∗	Israel	3180	—	—	0
Shehadeh et al. [31]	Palestine	1451.6	—	—	—
Jonas et al. [25]	India	2300	—	—	—
Godefrooij et al. [32]	The Netherlands	265	13.3	28.3	—
Nielsen et al. [33]	Denmark	86	1.3	—	—
Pearson et al. [34]^∗∗	United Kingdom	57, 229	4.5, 19.6	26.5, 22.3	—
Kennedy et al. [17]	United States	54.5	2.0	—	—

^∗n = 10 subjects with keratoconus. ^∗∗Data reported for white and Asian populations, respectively.